What does set/coast mean on a car?

[JoshuaFitz]

set/coast button is the cruise control function. More details about cruise control are as follows: The fuel-saving principle of cruise control: If the daily driving conditions are relatively smooth roads, such as straight highways without frequent traffic jams, then turning on cruise control will allow the vehicle's fuel injection volume and throttle opening to be controlled by the onboard computer. Both fuel injection and speed will become very uniform, reducing unnecessary speed changes, thereby achieving fuel-saving effects. The function of cruise control: The biggest function of cruise control is not fuel saving, but relieving driving fatigue. Some people may have heard that cruise control can save fuel, which is not completely wrong. Using cruise control under reasonable road conditions can indeed save fuel to a certain extent.

[AnnieLynn]

When driving long distances on the highway, I like to use the set coast function in the cruise control. Pressing the set button locks the current speed, and the car automatically maintains that speed, which is quite effortless. As for the coast button, it's used for deceleration and coasting—pressing it gradually reduces the speed without consuming fuel or wearing out the brake pads. Once, on my way back home from the city, covering hundreds of kilometers, I used coast to glide and slow down to avoid a congested section ahead. I didn’t have to slam on the brakes even once, saving a lot on fuel while driving smoothly the whole way. This system is quite cleverly designed and works well on open roads, but in crowded urban areas, manual control is best. Overall, it makes driving easier and safer, and I recommend both new and experienced drivers to try it out and get familiar with it.

[GarrettLynn]

Regarding the meaning of 'set coast' in cars, it refers to the combination of two actions in cruise control: setting and decelerating. After fixing the speed with the 'set' button, lightly pressing the 'coast' button gradually reduces the set value, allowing the car to coast with reduced engine fuel supply for a natural deceleration. I find this technology quite ingenious, as it involves subtle adjustments by a small computer to ensure smooth transitions without jerks. Not only does it save fuel, but it also extends the lifespan of components. I often notice slight changes in the fuel gauge when driving, which is scientifically similar to energy recovery. Most cars have these buttons located near the steering wheel, making them easy and safe to operate. However, remember to stay focused and avoid distractions in complex road conditions.

[AnthonyLynn]

When I first started learning to drive, I was completely confused when I heard 'set coast'. Later, I learned that it's a cruise control feature. Pressing 'set' makes the car remember the speed and drive automatically, while tapping the 'coast' button gradually reduces speed for a smooth glide, making it much easier without pressing the accelerator or brake. The first time I tried it on the highway, I used 'coast' to smoothly slow down when approaching a curve after setting the speed, which made me feel much safer without panic. This feature is thoughtfully designed, saving fuel and reducing operational burden, allowing beginners like me to get the hang of it quickly. The manual also recommends using it on straight roads to enhance convenience.